I noticed that in Plasma 6 the option to display in icons no longer appears. I’ve always found the sidebar view very confusing, and it’s always the first change I make when installing Plasma. Therefore, I would like you to consider your return. Thanks!
Removal of the icon view was decided early on for Plasma 6 and communicated to a wider audience in one or several of Nate Graham’s blog posts.
A while ago I came up with a mock-up of a different kind of icon view, and there might be room for something like this eventually either in an inconspicuous place within System Settings or as a separate app altogether (I’d call it “Korset”). Some developer would have to make this a priority though, and I’m not seeing that right now.